In a message dated 10/21/99 8:39:14 PM Pacific Daylight Time,
neilc@apphosting.com writes:
> I've been talking to Hans Pedersen (www.hi-flow.com) and he's been doing a
> lot of research into octane ratings in the USA and in Australia (he sells a
> supercharger y'see). Apparently, the US octane rating of 92, is the
> equivalent of 98 octane here in Australia! So Tim P., that would go a long
> way to explaining that consistent pinging problem you have, and many other
> Aussies complain of. We are on the extreme borderline here. Also Eric, it
> explains why you switching to 100 (australian rated) octane AvGas, makes
> such an improvement to your car. You are actually just giving it the fuel
it
> was originally designed for!
Well sort of...... There are two types of octane ratings Research and Motor.
One of these is much higher than the other. (I used to know which was
larger, but I forgot many years ago) The Octane rating used on the pumps in
the US is the average of these two ratings. I suspect that Aussie gas is not
averaged.
Here in California the pumps used to carry a decal that said
R+M
------
2 to denote that the ocatane rating was the average.
Rick Ewald
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